Private and confidential correspondence - Benzol, B.H.P., Christchurch Gas Co, Mar. 1929 - Dec. 1931. Vol. 236, SR5B

Shell Australia Limited, Private and confidential correspondence - Benzol, B.H.P., Christchurch Gas Co, Mar. 1929 - Dec. 1931. Vol. 236, SR5B (1929-1931), [UMA-ITE-2008004501447]. University of Melbourne Archives, accessed 15/12/2025, https://archives.library.unimelb.edu.au/nodes/view/309836